View Full Version : please help for choose best carburetor....
03-31-2012, 05:44 AM
hi , i have a pontiac formula 77 with engine 400 ( 6.6 )
and i want to buy a Carburetor but i don't know what Carburetor is better for my car. i don't want to use my car for racing and professional drag , it just beginner street race or street drag :)
what the holley carburetor is better for me?
and whats Difference between the Mechanical secondaries and vacuum secondaries ?
my engine parts is standard and its not aftermarket.
please help me. thank you :)
03-31-2012, 06:33 AM
Which Holley carburetor is better for me?
http://www.holley.com/applications/CarburetorSelector/CarbSelection.asp (Online Carburetor Selector)
...and what's the difference between the Mechanical secondaries and vacuum secondaries?
http://www.holley.com/TechService/FAQ.asp (Scroll down to "QUESTION How do I know if a vacuum or mechanical carburetor is best for me?")
03-31-2012, 01:36 PM
i use the carb selector , but its 7 carburetor introduce to me , but i dont know what in beter for me.
0-85670 ( 670cfm ) , 0-1850SA ( 600cfm ) , 0-1850S ( 600cfm ) , 0-1850C ( 600cfm ) , 0-85570 ( 570 cfm ) , 0-81670 ( 670 cfm ).
0-4776c ( 600 cfm )
some of them are dual pomp , and some of single pomp!!! , what carburetor better ??
03-31-2012, 02:55 PM
I used the carb selector but the 7 carburetors introduced to me...I don't know which is better for me.
0-85670 (670cfm), 0-1850SA (600cfm), 0-1850S (600cfm), 0-1850C (600cfm), 0-85570 (570 cfm), 0-81670 (670 cfm), 0-4776c (600 cfm).
Tell us more about your engine combination (how it's built, horsepower, etc.).
With 400 cubic inches, I suggest at least a 670 CFM carburetor.
Some of them are single pumper and some are double pumper!!! What carburetor is better ??
I don't want to use my car for racing and professional drag, just beginner street race or street drag.
According to your statement, you'd be better off with an electric choke, vacuum secondary (single pumper) carburetor.
I suggest their new line of carburetors, the Ultra Street Avenger. Do you want a carburetor with a zinc body or aluminum construction?
03-31-2012, 04:44 PM
my engine is v8 and 400 c.i.d and 220 hp , expected maximum RPM (Red line) is 5000 and the all of parts are standard ( not aftermarket ) ( just have headers ) ( my car is pontiac formula 1977 )
but i think at all , dual pumper is better single pumper. :)
670 isn't too much for my engine?!!
the carburetor body is not important. the good performance and Acceleration is important.
03-31-2012, 05:00 PM
My engine is v8 and 400 c.i.d and 220 hp, expected maximum RPM (Red line) is 5000 and
the all of parts are standard (not aftermarket - just have headers). My car is Pontiac Formula 1977.
670 isn't too much for my engine?!!
That's why I asked about your engine.
600 CFM (vacuum secondaries) is enough.
04-01-2012, 01:29 AM
i think this carburetor is good for my car , http://www.holley.com/0-85570.asp
What is your opinion?
04-01-2012, 06:32 AM
If you don't mind a manual choke, it will suit you fine.
04-01-2012, 07:11 AM
I don't think the difference is between manual choke and Electric Choke for me . ( but i`m not sure )
04-01-2012, 07:25 AM
Well, that's fine. Personally, I would not want to install a manual choke cable:
04-01-2012, 07:44 AM
Thank you very much for help , my friend ;)
Have a great help to me. :)
i choose holley 0-83570 .
04-01-2012, 01:06 PM
You have been a great help to me. :) I chose Holley 0-83570 (http://www.holley.com/0-83570.asp).
You're welcome and good final choice.
04-02-2012, 10:43 AM
excuse me , another question :)
What the adapter kit or adapter plate should I buy ? for holley 0-83570 ?
04-02-2012, 11:02 AM
Excuse me, another question. :)
Which adapter kit or adapter plate should I buy? for Holley 0-83570?
I'm assuming you have a spread-bore intake manifold?
If so, you'll use Holley #17-6 spread-bore to square-bore adapter:
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